I can forgive the 3GB VRAM if it comes with a 384 bus. I think the 780 can use most of it without running out of GPU power.

2GB was a bit small for the 680 even when it came out. 3GB is a sweet spot for single monitors up to 1440p and 1600p even with 4x and 8x AA, assuming that you've got a GPU that can actually use the memory. 6GB is only good for surround.

I'm good with 3GB but I wonder if the aftermarket 6GB 780's would be a farce just like 4GB 680's.

2GB was a bit small for the 680 even when it came out. 3GB is a sweet spot for single monitors up to 1440p and 1600p even with 4x and 8x AA, assuming that you've got a GPU that can actually use the memory. 6GB is only good for surround.

I'm good with 3GB but I wonder if the aftermarket 6GB 780's would be a farce just like 4GB 680's.

This will probably be easy to overclock to a Titans stock performance.

With a ~13% difference in performance, how much do you think it would be needed to OC the card to match? And I wonder if that could be done with the stock cooler, while maintaining decent noise levels.